Our 3.0 SP X5 has 255/55-18 Michelin XGV4+ tires on it. I hate them, and don't want my wife driving around on them this winter. So I'm looking at tires and see that the Nokian WRG2 that I am interested in comes in a 255/55-18V speed rated rated tire, and a 255/60-18 H speed rated tire. Since the 3.0's top speed is electronically limited to 130 mph, and it comes with H speed rated tires, this isn't an issue for me, and the tires are considerably cheaper.

They are however, almost an inch taller overall. I expect to see the speedometer off slightly, and maybe even feel a small decrease in acceleration as a result fo the changed overall gearing. But the question is, will BMW deny warrantee coverage because fo the different tire size? Anyone have any experience one way or the other?

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~Scott

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Black Sapphire Metallic/Sand Beige '13 E70 35d, SP, NAV, Tech, Comfort Access/Seats
20" Style 214's Wrapped in Continental DWS06 Extreme Contacts

(SOLD) Alpine White/Sand Beige '06 E53 3.0, SP, PP, CC, RC, NAV, Sat Radio
19" Style 63's Wrapped in Bridgestone Dueler HP Sports-- Summer Shoes
18" Style 131's Wrapped in 255/55-18 Nokian WRG2 SUV's -- Winter Boots